.code-box-demo .ant-row>div:not(.gutter-row):nth-child(2n+1) {
    background: rgba(0, 146, 255, .75);
}

.code-box-demo .ant-row>div:not(.gutter-row) {
    padding: 16px 0;
    background: #0092ff;
}

.code-box-demo .ant-row>div {
    min-height: 30px;
    margin-top: 8px;
    margin-bottom: 8px;
    color: #fff;
    text-align: center;
    border-radius: 0;
}
.markdown {
    color: #000000d9;
    font-size: 14px;
    line-height: 2;
}
.markdown h2, .markdown h3, .markdown h4, .markdown h5, .markdown h6 {
    clear: both;
    color: #000000d9;
    font-weight: 500;
    font-family: Avenir,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,apple color emoji,segoe ui emoji,Segoe UI Symbol,noto color emoji,sans-serif;
}
.markdown h2 {
    font-size: 24px;
}